a difference, by the calling as a navy seal. >> reporter: multiple tours in iraq and afghanistan. >> he had the arms of a healer and warrior. earning the distinction as a certified medic. >> reporter: sean smith, serving in the air force and then the foreign service. >> he knew the perils of this calling. >> reporter: they loved service and enjoyed adventure, none more than the one-time peace corp volunteer who became the ambassador to a war-torn nation. chris steven's sister spoke about him. >> he spoke about the security but really didn't make a deal of it. he more spoke of how much he enjoyed, you know, the work he was doing. >> he was known not only for his courage, but for his smile. goofy, but contagious, with the california cool. >> reporter: she vowed not to retreat. >> so we will face the future undaunted. >> greater love has no man than this, that a man lay down his life for his friends. the flag they served under now carries them home. >> reporter: the president and hillary clinton in a rare public glimpse of shared emotions. today, u.s. officials said there was no prior intellig
